The original design is from Manso IIRC , yet there s no indication
of this in the opening post.....

If you read CFA thread you can see there that manso design is the one I came back after some circles CFA Topology Audio Amplifiers. It is a bit different specially type of compensation. This one is just more powerful version of the mosfet version I presented there.

Here is low power versions of LMOS CFA amp with simplified TPC, one with lower loop gain(LG – 78 db up to 10kHz) and one with higher LG(120 dB up to 1kHz).
High power AMP should give even better result.
It is interesting to see IMD for those two different LG.
Input signals 19kHz and 20kHz amplitude 1.2Vpp.
IMD for lower LG is 116 dB and for higher LG it is 157 dB
Does more complication is worth much lower IMD??
Damir

I see this idea has resurfaced and you've found a better compensation method.

It's interesting to note the IMD differences. You should reference this in the CFA thread.

Have you found a way of extending the LG up further than 1KHz in the more complex version. Its not easy, I've found.

No I did not, I think that there is the pole at the same frequency, just shunted in low LG amp.
I don't think that it's important as IMD is normaly manifestad at lower frequences, imput filter should prevent to high frequiences input the amp(maybe better input filter as Edmond suggested before).